Philco 90 capacitor problems - Printable Version
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Philco 90 capacitor problems - 37silverstreak - 01-03-2012
Hey everyone,
Working on my 90 project. It's a mid production one with the single 47 tube, serial number 912648 and I have hit a snag! Some hack attempted repair to this set years ago and they removed the metal can condensor pack that mounts to the rear of the chassis. It's marked 24 on the parts layout schematic and the Philco part is #03325. It's a metal can that contains 4 caps- 1-.1mfd, 1-.13mfd, and 2-.25mfd. They replaced it with a multi section electrolytic twist lock unit! The lowest value on this cap is 5-10mfd
!! Oh yeah and they used line cord to wire it in! Again !!Anyway, it's been removed and I've scrounged up a suitable replacement metal can and rebuilt it with the correct value caps. Here is my problem, I don't have any reference as to which value cap goes where in the set. the Riders schematic doesn't list the cap values, only the number 24 to locate the part on the layout schematic. And as far as I can see there is no drawing of the part giving wire colors or values. Does anyone have any information on which value goes where or how I can go about finding out?
Any info would be greatly appreciated! Thanks!
Kevin
Re: Philco 90 capacitor problems - Carl Travis - 01-03-2012
Hmm,
This shows it as a triple .25?
http://www.nostalgiaair.org/PagesByModel/210/M0043210.pdf
The same on Chuck's site:
http://www.philcorepairbench.com/metalcap.htm
Re: Philco 90 capacitor problems - 37silverstreak - 01-03-2012
cwtravis Wrote:Hmm,Hey Carl,
This shows it as a triple .25?
http://www.nostalgiaair.org/PagesByModel/210/M0043210.pdf
The same on Chuck's site:
http://www.philcorepairbench.com/metalcap.htm
Thanks for the info! I'm a little confused though. The part number listed on page 2-29 of Riders Vol. 2 gives the same part number but completely different cap values. I'm going to redo using the info provided on these links. Thanks for your help!!
Kevin
Re: Philco 90 capacitor problems - Carl Travis - 01-04-2012
I see Ron has a schematic posted that has some different values than the Riders:
http://www.philcoradio.com/tech/images/90b.jpg
Re: Philco 90 capacitor problems - Ron Ramirez - 01-04-2012
That's why I posted that schematic. The info in Rider's is wrong. My schematic is correct.
Also see:
http://www.philcoradio.com/tech/90error.htm
Re: Philco 90 capacitor problems - 37silverstreak - 01-04-2012
Thanks for the help guys! It makes more sense now checking the new info against my set. One more question- I see that the voltage values for the caps in these cans is 1200 to 2000volts! Are these high voltage ratings necessary in this set? Or can I get by with 630 volt caps. I'm having trouble finding caps with this voltage rating in the sizes needed. Thanks again!
Kevin
Re: Philco 90 capacitor problems - etech - 01-08-2012
Kevin - I can only tell you that I used the standard yellow 630 volt film caps when I re-built those metal cans in all three of my 90's and I have not had any problems with them.
Ed
Re: Philco 90 capacitor problems - 37silverstreak - 01-08-2012
etech Wrote:Kevin - I can only tell you that I used the standard yellow 630 volt film caps when I re-built those metal cans in all three of my 90's and I have not had any problems with them.Thanks Ed. That's what I've decided to do as well. given the fact that this set won't see everyday use, I think it will be okay.
Ed
Kevin